It was great. We did it as well.
Some tips:
Get the photopass photographers to take alot of your groups photos.
Also take alot of you and your family that you can upload to the website to include in the video. Don't worry so mouch about scenes, the website has alot of disney photos you can use if you need them.
The movie is brokendown by chapters by parks (MK, EP, MGM and AK) and then beyond the parks (Lodging, dinner shows, Downtown Disney).
You can duplicate chapters if you have alot of photos. I dedicated one chapter to each park, one beyond the parks to AKL where we stayed and another beyond the parks to downtown disney, Spirit of Aloha, etc.